I've setup Pihole on both Synology and Ubuntu with success (lucky me). While on Ubuntu was quite straightforward, on Synology needed some experiment.submitted by europacafe to pihole [link] [comments]
I do not activate DHCP function on my Synology; my TPLink wifi router handles it without problem.
My Synology fixed IP is 192.168.2.4 (yours could be different)
On Synology, thanks to this website, https://servicemax.com.au/tips/pi-hole-v4-on-synology-in-docker-the-easy-way/ which gave me 99% success.
Please find below broad steps in setting Pihole version 4.2.2 (latest as at this article) on Synology DSM 6.xx docker:
They are all the set up I did on my Synology.
On main Wifi Router
The other setup to do is to change default DNS servers on my main wifi router (TPLink). My ISP assigns DNS1 and DNS2 IP for my router, but the router allows me to manually change them. I changed only the DNS1 value to be my Synology fixed IP address, which is 192.168.2.4; and left the second DNS remains same. From this setup, all devices in my home will be using Pihole services automatically (filter out Ad, porn websites, bitcoin mining....). You may add more blacklist urls under Setting in Pihole admin page.
If you don't want Pihole to filter ad for all your devices, you don't have to change the DNS on your main router. Instead, on the device you wish to have Pihole controlled, you can change the first DNS IP to be your Synology IP, mine is 192.168.2.4 (yours could be different); and keeps the second DNS as is (mine is my main router IP which is 192.168.2.1)
Once you completed the setup on both Synology and Router, log into Pihole admin page, see the statistics in Dashboard, it should display Total number of queries, queries blocked, etc... If no movement on these numbers, that means the setup was not right, you can check the Pihole container log on Synology (in DetailsLog tab).
Pihole container consumes only 0.1x% of my DS411+II Atom D525 CPU, and 300+/- MB ram (from 2GB total RAM). I also run full Calibre engine and content server docker without problem on it.
The Pihole on my Ubuntu will be my backup.
Ports mapping: change from Auto
Change ServerIP value and add variable WEBPASSWORD only
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